[FFmpeg-cvslog] avcodec/sbrdsp_fixed: Fix integer overflow in sbr_hf_apply_noise()
Michael Niedermayer
git at videolan.org
Sun Jul 9 00:46:11 EEST 2017
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Jul 2 03:30:54 2017 +0200| [2061de8a3f73f14806e5f6ccaf9a635f740a54e6] | committer: Michael Niedermayer
avcodec/sbrdsp_fixed: Fix integer overflow in sbr_hf_apply_noise()
Fixes: runtime error: signed integer overflow: -2049425300 + -117591631 cannot be represented in type 'int'
Fixes: part of 2096/clusterfuzz-testcase-minimized-4901566068817920
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2061de8a3f73f14806e5f6ccaf9a635f740a54e6
---
libavcodec/sbrdsp_fixed.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/sbrdsp_fixed.c b/libavcodec/sbrdsp_fixed.c
index 218bb1acd8..fe48104021 100644
--- a/libavcodec/sbrdsp_fixed.c
+++ b/libavcodec/sbrdsp_fixed.c
@@ -264,8 +264,8 @@ static av_always_inline int sbr_hf_apply_noise(int (*Y)[2],
int m;
for (m = 0; m < m_max; m++) {
- int y0 = Y[m][0];
- int y1 = Y[m][1];
+ unsigned y0 = Y[m][0];
+ unsigned y1 = Y[m][1];
noise = (noise + 1) & 0x1ff;
if (s_m[m].mant) {
int shift, round;
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